performance

Flash vs. DRAM in PCs – Flash Wins

Chart from Objective Analysis report: How PC NAND will Undermine DRAMSome time ago Objective Analysis ran nearly 300 standard benchmarks on a PC with varying amounts of flash and DRAM and found that a dollar’s worth of flash provided a greater performance boost than a dollar’s worth of DRAM once the DRAM size grew above a certain minimum (1-2GB) depending on the benchmark.

You might wonder how this could possibly be true.  Everyone knows that best way to improve any computing system’s performance is to add DRAM main memory.  How could flash, which is orders of magnitude slower than DRAM, provide a bigger performance boost than DRAM?

It all makes sense if you think of the DRAM of something that is there only to make the HDD look faster.  More is better, but if you can use a little less DRAM and add a large flash memory layer then disk accesses appear to speed up even more.

The benchmark data and the price/performance findings that are Continue reading

IOPS Survey – Still Seeking Participants

Please Take the 5-Minute IOPS SurveyTom Coughlin and I are still seeking IT professional inputs for our 5-minute IOPS survey.

Please take a brief moment to share your thoughts on the importance of I/O in your system. It’s only 5 multiple-choice questions.

Click HERE and let us know what kind of storage performance you need. Even a hunch is good.

Many thanks!

 

Not all SSDs are Created Equal

Results of the SNIA PTS on Seventeen SSDs and one HDDSSDs vary widely in performance.  This is something that becomes amazingly clear when a number of these devices are put through a battery of tests.

Calypso Systems ran the SNIA SSD Performance Test Specification (PTS), outlined in an earlier post in this blog, on seventeen SSDs and a single HDD.  The results appear, in miniature, in the graphic for this post. Continue reading